[Beowulf] UPS & power supply instability

Andrew Piskorski atp at piskorski.com
Wed Sep 28 13:18:34 EDT 2005

On Wed, Sep 28, 2005 at 09:08:01AM -0400, Robert G. Brown wrote:

> Don't assume that Dell's power supplies are really PFC just because they
> say that they are, also.  Believe it when you put a dual input scope on
> it and measure the current and voltage simultaneously as a function of
> time on a triggered scope and see two perfectly sinusoidal waves, in
> phase.

Is the "PFC" readout of a Kill-a-Watt sufficient for verifying that a
power supply is really truly doing PFC?

Andrew Piskorski <atp at piskorski.com>
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